Function getThreadReplies

server/src/slack/client.ts:935–973

(
  channelId: string,
  threadTs: string
)

 * Returns all messages in a thread, including the parent message
 */
export async function getThreadReplies(
  channelId: string,
  threadTs: string
): Promise<SlackThreadMessage[]> {
  if (!SLACK_BOT_TOKEN) {
    throw new Error('ADDIE_BOT_TOKEN is not configured');
  }

  try {
    const url = new URL(`${SLACK_API_BASE}/conversations.replies`);
    url.searchParams.set('channel', channelId);
    url.searchParams.set('ts', threadTs);
    url.searchParams.set('limit', '100'); // Get up to 100 messages in thread

    const response = await fetch(url.toString(), {
      method: 'GET',
      headers: {
        Authorization: `Bearer ${SLACK_BOT_TOKEN}`,
        'Content-Type': 'application/x-www-form-urlencoded',
      },
    });

    const data = await response.json() as {
      ok: boolean;
      messages?: SlackThreadMessage[];
      error?: string;
    };

    if (!data.ok) {
      logger.warn({ error: data.error, channelId, threadTs }, 'Failed to get thread replies');
      return [];
    }

    return data.messages || [];
  } catch (error) {
    logger.error({ error, channelId, threadTs }, 'Error fetching thread replies');
    return [];
  }
}

/**
 * Open a group DM (multi-person direct message) with multiple users